<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <!--
    type="module"：ES6的语法。相当于给每个引入的js文件设置为一个房间
  -->
  <script src="main.js" type="module"></script>
  <script src="xiaoming.js" type="module"></script>
  <script src="xiaohong.js" type="module"></script>
</head>
<body>

</body>
</html>